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Revision: 1.166
Committed: Tue Mar 16 00:20:16 2010 UTC (14 years, 2 months ago) by root
Branch: MAIN
Changes since 1.165: +2 -1 lines
Log Message: 
rough EV_FEATURES implementation

File Contents

# User Rev Content
1 root 1.14 Revision history for libev, a high-performance and full-featured event loop.
2 root 1.1
3 root 1.166 TODO: ABI??? API????? Changes???
4 root 1.161 - ev_embed_stop did not correctly stop the watcher (very good
5     testcase by Vladimir Timofeev).
6 root 1.164 - applied win32 fixes by Michael Lenaghan (also James Mansion).
7 root 1.166 - replace EV_MINIMAL by EV_FEATURES.
8 root 1.158 - remove dependency on sys/queue.h on freebsd (patch by Vanilla Hsu).
9 root 1.159 - configure now prepends -O3, not appends it, so one can still
10     override it.
11 root 1.160 - disable poll backend on AIX, the poll header spams the namespace
12     and it's not worth working around dead platforms (reported
13     and analyzed by Aivars Kalvans).
14 root 1.162 - improve header file compatibility of the standalone eventfd code
15     in an obscure case.
16 root 1.163 - implement EV_AVOID_STDIO option.
17     - do not use sscanf to parse linux version number (smaller, faster,
18     no sscanf dependency).
19 root 1.164 - new EV_CHILD_ENABLE and EV_SIGNAL_ENABLE configurable settings.
20 root 1.165 - add section on accept() problems to the manpage.
21 root 1.157
22 root 1.156 3.9 Thu Dec 31 07:59:59 CET 2009
23 root 1.155 - signalfd is no longer used by default and has to be requested
24     explicitly - this means that easy to catch bugs become hard to
25     catch race conditions, but the users have spoken.
26     - point out the unspecified signal mask in the documentation, and
27     that this is a race condition regardless of EV_SIGNALFD.
28 root 1.142 - backport inotify code to C89.
29 root 1.148 - inotify file descriptors could leak into child processes.
30 root 1.151 - ev_stat watchers could keep an errornous extra ref on the loop,
31     preventing exit when unregistering all watchers (testcases
32 root 1.150 provided by ry@tinyclouds.org).
33 root 1.143 - implement EV_WIN32_HANDLE_TO_FD and EV_WIN32_CLOSE_FD configuration
34 root 1.145 symbols to make it easier for apps to do their own fd management.
35 root 1.144 - support EV_IDLE_ENABLE being disabled in ev++.h
36     (patch by Didier Spezia).
37 root 1.147 - take advantage of inotify_init1, if available, to set cloexec/nonblock
38     on fd creation, to avoid races.
39 root 1.150 - the signal handling pipe wasn't always initialised under windows
40     (analysed by lekma).
41 root 1.146 - changed minimum glibc requirement from glibc 2.9 to 2.7, for
42     signalfd.
43 root 1.152 - add missing string.h include (Denis F. Latypoff).
44 root 1.153 - only replace ev_stat.prev when we detect an actual difference,
45     so prev is (almost) always different to attr. this might
46     have caused the probems with 04_stat.t.
47 root 1.154 - add ev::timer->remaining () method to C++ API.
48 root 1.142
49 root 1.141 3.8 Sun Aug 9 14:30:45 CEST 2009
50 root 1.133 - incompatible change: do not necessarily reset signal handler
51     to SIG_DFL when a sighandler is stopped.
52 root 1.135 - ev_default_destroy did not properly free or zero some members,
53 root 1.134 potentially causing crashes and memory corruption on repated
54     ev_default_destroy/ev_default_loop calls.
55 root 1.133 - take advantage of signalfd on GNU/Linux systems.
56     - document that the signal mask might be in an unspecified
57     state when using libev's signal handling.
58 root 1.136 - take advantage of some GNU/Linux calls to set cloexec/nonblock
59     on fd creation, to avoid race conditions.
60 root 1.132
61 root 1.131 3.7 Fri Jul 17 16:36:32 CEST 2009
62 root 1.128 - ev_unloop and ev_loop wrongly used a global variable to exit loops,
63     instead of using a per-loop variable (bug caught by accident...).
64     - the ev_set_io_collect_interval interpretation has changed.
65     - add new functionality: ev_set_userdata, ev_userdata,
66 root 1.126 ev_set_invoke_pending_cb, ev_set_loop_release_cb,
67 root 1.132 ev_invoke_pending, ev_pending_count, together with a long example
68     about thread locking.
69 root 1.128 - add ev_timer_remaining (as requested by Denis F. Latypoff).
70     - add ev_loop_depth.
71 root 1.124 - calling ev_unloop in fork/prepare watchers will no longer poll
72     for new events.
73 root 1.115 - Denis F. Latypoff corrected many typos in example code snippets.
74     - honor autoconf detection of EV_USE_CLOCK_SYSCALL, also double-
75     check that the syscall number is available before trying to
76     use it (reported by ry@tinyclouds).
77 root 1.117 - use GetSystemTimeAsFileTime instead of _timeb on windows, for
78 root 1.116 slightly higher accuracy.
79 root 1.122 - properly declare ev_loop_verify and ev_now_update even when
80     !EV_MULTIPLICITY.
81 root 1.121 - do not compile in any priority code when EV_MAXPRI == EV_MINPRI.
82 root 1.123 - support EV_MINIMAL==2 for a reduced API.
83 root 1.125 - actually 0-initialise struct sigaction when installing signals.
84 root 1.127 - add section on hibernate and stopped processes to ev_timer docs.
85 root 1.115
86 root 1.113 3.6 Tue Apr 28 02:49:30 CEST 2009
87 root 1.107 - multiple timers becoming ready within an event loop iteration
88     will be invoked in the "correct" order now.
89 root 1.105 - do not leave the event loop early just because we have no active
90     watchers, fixing a problem when embedding a kqueue loop
91     that has active kernel events but no registered watchers
92     (reported by blacksand blacksand).
93 root 1.102 - correctly zero the idx values for arrays, so destroying and
94     reinitialising the default loop actually works (patch by
95     Malek Hadj-Ali).
96 root 1.108 - implement ev_suspend and ev_resume.
97 root 1.106 - new EV_CUSTOM revents flag for use by applications.
98 root 1.109 - add documentation section about priorites.
99     - add a glossary to the dcoumentation.
100 root 1.111 - extend the ev_fork description slightly.
101 root 1.112 - optimize a jump out of call_pending.
102 root 1.102
103 root 1.101 3.53 Sun Feb 15 02:38:20 CET 2009
104     - fix a bug in event pipe creation on win32 that would cause a
105     failed assertion on event loop creation (patch by Malek Hadj-Ali).
106 root 1.100 - probe for CLOCK_REALTIME support at runtime as well and fall
107     back to gettimeofday if there is an error, to support older
108     operating systems with newer header files/libraries.
109     - prefer gettimeofday over clock_gettime with USE_CLOCK_SYSCALL
110     (default most everywhere), otherwise not.
111    
112 root 1.99 3.52 Wed Jan 7 21:43:02 CET 2009
113 root 1.97 - fix compilation of select backend in fd_set mode when NFDBITS is
114     missing (to get it to compile on QNX, reported by Rodrigo Campos).
115     - better select-nfds handling when select backend is in fd_set mode.
116     - diagnose fd_set overruns when select backend is in fd_set mode.
117     - due to a thinko, instead of disabling everything but
118     select on the borked OS X platform, everything but select was
119     allowed (reported by Emanuele Giaquinta).
120 root 1.95 - actually verify that local and remote port are matching in
121     libev's socketpair emulation, which makes denial-of-service
122     attacks harder (but not impossible - it's windows). Make sure
123 root 1.96 it even works under vista, which thinks that getpeer/sockname
124     should return fantasy port numbers.
125 root 1.100 - include "libev" in all assertion messages for potentially
126 root 1.97 clearer diagnostics.
127 root 1.98 - event_get_version (libevent compatibility) returned
128     a useless string instead of the expected version string
129     (patch by W.C.A. Wijngaards).
130 root 1.95
131 root 1.94 3.51 Wed Dec 24 23:00:11 CET 2008
132 root 1.91 - fix a bug where an inotify watcher was added twice, causing
133 root 1.92 freezes on hash collisions (reported and analysed by Graham Leggett).
134 root 1.87 - new config symbol, EV_USE_CLOCK_SYSCALL, to make libev use
135     a direct syscall - slower, but no dependency on librt et al.
136 root 1.88 - assume negative return values != -1 signals success of port_getn
137     (http://cvs.epicsol.org/cgi/viewcvs.cgi/epic5/source/newio.c?rev=1.52)
138     (no known failure reports, but it doesn't hurt).
139 root 1.93 - fork detection in ev_embed now stops and restarts the watcher
140     automatically.
141 root 1.89 - EXPERIMENTAL: default the method to operator () in ev++.h,
142     to make it nicer to use functors (requested by Benedek László).
143     - fixed const object callbacks in ev++.h.
144 root 1.90 - replaced loop_ref argument of watcher.set (loop) by a direct
145     ev_loop * in ev++.h, to avoid clashes with functor patch.
146 root 1.91 - do not try to watch the empty string via inotify.
147 root 1.92 - inotify watchers could be leaked under certain circumstances.
148     - OS X 10.5 is actually even more broken than earlier versions,
149     so fall back to select on that piece of garbage.
150 root 1.93 - fixed some weirdness in the ev_embed documentation.
151 root 1.87
152 root 1.86 3.49 Wed Nov 19 11:26:53 CET 2008
153 root 1.83 - ev_stat watchers will now use inotify as a mere hint on
154     kernels <2.6.25, or if the filesystem is not in the
155     "known to be good" list.
156 root 1.84 - better mingw32 compatibility (it's not as borked as native win32)
157     (analysed by Roger Pack).
158 root 1.85 - include stdio.h in the example program, as too many people are
159     confused by the weird C language otherwise. I guess the next thing
160     I get told is that the "..." ellipses in the examples don't compile
161     with their C compiler.
162 root 1.83
163 root 1.80 3.48 Thu Oct 30 09:02:37 CET 2008
164 root 1.71 - further optimise away the EPOLL_CTL_ADD/MOD combo in the epoll
165     backend by assuming the kernel event mask hasn't changed if
166     ADD fails with EEXIST.
167 root 1.75 - work around spurious event notification bugs in epoll by using
168 root 1.77 a 32-bit generation counter. recreate kernel state if we receive
169 root 1.78 spurious notifications or unwanted events. this is very costly,
170     but I didn't come up with this horrible design.
171 root 1.71 - use memset to initialise most arrays now and do away with the
172     init functions.
173 root 1.72 - expand time-out strategies into a "Be smart about timeouts" section.
174     - drop the "struct" from all ev_watcher declarations in the
175 root 1.73 documentation and did other clarifications (yeah, it was a mistake
176     to have a struct AND a function called ev_loop).
177 root 1.74 - fix a bug where ev_default would not initialise the default
178     loop again after it was destroyed with ev_default_destroy.
179 root 1.79 - rename syserr to ev_syserr to avoid name clashes when embedding,
180     do similar changes for event.c.
181 root 1.71
182 root 1.69 3.45 Tue Oct 21 21:59:26 CEST 2008
183 root 1.67 - disable inotify usage on linux <2.6.25, as it is broken
184     (reported by Yoann Vandoorselaere).
185     - ev_stat errornously would try to add inotify watchers
186 root 1.68 even when inotify wasn't available (this should only
187 root 1.67 have a performance impact).
188 root 1.65 - ev_once now passes both timeout and io to the callback if both
189     occur concurrently, instead of giving timeouts precedence.
190 root 1.66 - disable EV_USE_INOTIFY when sys/inotify.h is too old.
191 root 1.65
192 root 1.62 3.44 Mon Sep 29 05:18:39 CEST 2008
193     - embed watchers now automatically invoke ev_loop_fork on the
194     embedded loop when the parent loop forks.
195 root 1.58 - new function: ev_now_update (loop).
196 root 1.57 - verify_watcher was not marked static.
197 root 1.59 - improve the "associating..." manpage section.
198 root 1.60 - documentation tweaks here and there.
199 root 1.57
200 root 1.56 3.43 Sun Jul 6 05:34:41 CEST 2008
201 root 1.54 - include more include files on windows to get struct _stati64
202 root 1.56 (reported by Chris Hulbert, but doesn't quite fix his issue).
203 root 1.53 - add missing #include <io.h> in ev.c on windows (reported by
204     Matt Tolton).
205    
206 root 1.52 3.42 Tue Jun 17 12:12:07 CEST 2008
207 root 1.50 - work around yet another windows bug: FD_SET actually adds fd's
208     multiple times to the fd_*SET*, despite official MSN docs claiming
209 root 1.51 otherwise. Reported and well-analysed by Matt Tolton.
210     - define NFDBITS to 0 when EV_SELECT_IS_WINSOCKET to make it compile
211 root 1.48 (reported any analysed by Chris Hulbert).
212 root 1.49 - fix a bug in ev_ebadf (this function is only used to catch
213     programming errors in the libev user). reported by Matt Tolton.
214     - fix a bug in fd_intern on win32 (could lead to compile errors
215     under some circumstances, but would work correctly if it compiles).
216     reported by Matt Tolton.
217 root 1.50 - (try to) work around missing lstat on windows.
218 root 1.45 - pass in the write fd set as except fd set under windows. windows
219 root 1.46 is so uncontrollably lame that it requires this. this means that
220     switching off oobinline is not supported (but tcp/ip doesn't
221     have oob, so that would be stupid anyways.
222 root 1.47 - use posix module symbol to auto-detect monotonic clock presence
223     and some other default values.
224 root 1.45
225 root 1.44 3.41 Fri May 23 18:42:54 CEST 2008
226 root 1.46 - work around an obscure bug in winsocket select: if you
227 root 1.40 provide only empty fd sets then select returns WSAEINVAL. how sucky.
228 root 1.41 - improve timer scheduling stability and reduce use of time_epsilon.
229 root 1.36 - use 1-based 2-heap for EV_MINIMAL, simplifies code, reduces
230     codesize and makes for better cache-efficiency.
231     - use 3-based 4-heap for !EV_MINIMAL. this makes better use
232     of cpu cache lines and gives better growth behaviour than
233     2-based heaps.
234 root 1.38 - cache timestamp within heap for !EV_MINIMAL, to avoid random
235     memory accesses.
236     - document/add EV_USE_4HEAP and EV_HEAP_CACHE_AT.
237 root 1.33 - fix a potential aliasing issue in ev_timer_again.
238 root 1.35 - add/document ev_periodic_at, retract direct access to ->at.
239     - improve ev_stat docs.
240     - add portability requirements section.
241 root 1.39 - fix manpage headers etc.
242 root 1.40 - normalise WSA error codes to lower range on windows.
243 root 1.43 - add consistency check code that can be called automatically
244     or on demand to check for internal structures (ev_loop_verify).
245 root 1.31
246 root 1.30 3.31 Wed Apr 16 20:45:04 CEST 2008
247     - added last minute fix for ev_poll.c by Brandon Black.
248 root 1.29
249 root 1.28 3.3 Wed Apr 16 19:04:10 CEST 2008
250 root 1.23 - event_base_loopexit should return 0 on success
251     (W.C.A. Wijngaards).
252 root 1.20 - added linux eventfd support.
253     - try to autodetect epoll and inotify support
254     by libc header version if not using autoconf.
255 root 1.21 - new symbols: EV_DEFAULT_UC and EV_DEFAULT_UC_.
256     - declare functions defined in ev.h as inline if
257     C99 or gcc are available.
258     - enable inlining with gcc versions 2 and 3.
259 root 1.25 - work around broken poll implementations potentially
260     not clearing revents field in ev_poll (Brandon Black)
261     (no such systems are known at this time).
262 root 1.23 - work around a bug in realloc on openbsd and darwin,
263     also makes the errornous valgrind complaints
264     go away (noted by various people).
265 root 1.26 - fix ev_async_pending, add c++ wrapper for ev_async
266     (based on patch sent by Johannes Deisenhofer.
267     - add sensible set method to ev::embed.
268 root 1.27 - made integer constants type int in ev.h.
269 root 1.20
270 root 1.19 3.2 Wed Apr 2 17:11:19 CEST 2008
271 root 1.15 - fix a 64 bit overflow issue in the select backend,
272     by using fd_mask instead of int for the mask.
273 root 1.16 - rename internal sighandler to avoid clash with very old perls.
274 root 1.18 - entering ev_loop will not clear the ONESHOT or NONBLOCKING
275     flags of any outer loops anymore.
276 root 1.17 - add ev_async_pending.
277 root 1.15
278 root 1.14 3.1 Thu Mar 13 13:45:22 CET 2008
279 root 1.12 - implement ev_async watchers.
280 root 1.10 - only initialise signal pipe on demand.
281     - make use of sig_atomic_t configurable.
282 root 1.14 - improved documentation.
283 root 1.10
284 root 1.9 3.0 Mon Jan 28 13:14:47 CET 2008
285 root 1.6 - API/ABI bump to version 3.0.
286 root 1.4 - ev++.h includes "ev.h" by default now, not <ev.h>.
287     - slightly improved documentation.
288 root 1.5 - speed up signal detection after a fork.
289 root 1.6 - only optionally return trace status changed in ev_child
290     watchers.
291 root 1.8 - experimental (and undocumented) loop wrappers for ev++.h.
292 root 1.4
293 root 1.2 2.01 Tue Dec 25 08:04:41 CET 2007
294 root 1.3 - separate Changes file.
295 root 1.2 - fix ev_path_set => ev_stat_set typo.
296     - remove event_compat.h from the libev tarball.
297     - change how include files are found.
298     - doc updates.
299     - update licenses, explicitly allow for GPL relicensing.
300    
301     2.0 Sat Dec 22 17:47:03 CET 2007
302     - new ev_sleep, ev_set_(io|timeout)_collect_interval.
303     - removed epoll from embeddable fd set.
304     - fix embed watchers.
305     - renamed ev_embed.loop to other.
306     - added exported Symbol tables.
307     - undefine member wrapper macros at the end of ev.c.
308     - respect EV_H in ev++.h.
309    
310     1.86 Tue Dec 18 02:36:57 CET 2007
311     - fix memleak on loop destroy (not relevant for perl).
312    
313     1.85 Fri Dec 14 20:32:40 CET 2007
314     - fix some aliasing issues w.r.t. timers and periodics
315     (not relevant for perl).
316    
317     (for historic versions refer to EV/Changes, found in the Perl interface)
318    
319 root 1.1 0.1 Wed Oct 31 21:31:48 CET 2007
320     - original version; hacked together in <24h.
321